nelson



March 8, 1932. AQc. NELSON 1,848,647

PUMP

Filled Aug. 28, 1930 -3 Sheets-Sheet l /7 gym/1to1 March 8, 1932. A.NELSON 1,848,647

PUMP

Filed Aug. 28, 1930 3 Sheets-Sheet 2 A. C, NELSON March 8, 1932.

PUMP

3 ShQtS-Sheet 3 Filed Aug. 28, 1930 Patented Mar. 8, 1932 Urfaran STATESARTHUR C. NELSON, OF ALEXANDRIA, MINNESOTA PUMP Application filed August2s, 1930. serial No. 478,426.

This invention relates to the well pump which forms the subject matterof my application filed April 19, 1928, Serially Numbered 271,211 andallowed August 7, 1930, and which comprises a solid piston, meanslocated below the pistonl and adapted to anchor it in a well, a cylinderslidably engaging the piston and provided near-its upper end with avalve controlled intake port, a reciprocating discharge line having itslower end connected to and communicating with the upper end of thecylinder, and means adapted to limit the movement of they cylinder in adirection permitting its separation from the piston.

' The present invention has for one of its objects to improve andsimplify the general construction of the pump, and to attain this endcomprehends the employment of a tubular piston so as to enable the fluidto be drawn therethrough into the cylinder and thus obviate thenecessity of providing the cylinder with a valved. intake port.

The invention further comprehends the employment of pistonanchoringmeans which shall include a tube arranged in communication withthe pistonv and provided with a valve controlled'intake port.

The invention further comprehends the employment of a cylinder soconstructed as to permit the washing out of any sand and sedimentaccumulating on top of the piston whereby to prevent the pump fromsandingu f Plhe invention still further comprehends the employmentv ofpiston anchoring means which shall be adapted to permit the piston tofbesecured to the lining of a well at any point necessary to permit'theeffective elevation of the water in the well.

The invention is hereinafter more fully described and claimed, andillustrated in the accompanying drawings, wherein:-

Figure 1 is a view partly in vertical section and partly in sideelevation of a well pump constructed in accordance with the presentinvention; Y Y p Figure 2'is a sectional view 'on anuenlarged scaletaken on the vertical plane indicated by the line 2`2fof Figure 1;

Figure 3 is a sectional view on an enlarged scale taken on the verticalplane indicated by the line 3 3 of Figure l;

Figure 4L is a sectional view taken on the horizontal plane indicated bythe line 4 4: of Figure 3;

Figure 5 is a sectional view taken on the horizontal plane indicated bythe line 5 5 of Figure 3;

Figure 6 is a sectional view taken on the horizontal plane indicated bythe line 6-6 of Figure 2;

Figure 7 is a sectional view taken on the horizontal plane indicated bythe line 7-7 of Figure 2; Figure 8 is a view partly in vertical sectionand partly in side elevation of the lower portion of the pump,illustrating a modified form of the means for preventing the separationof the cylinder from the piston and a modified form of the means forsecuring the cup leather of the piston in place, and

Figure 9 is a detail sectional view of the upper end of the piston shownin Figure 8.

Referring .in detail to the drawings, 1 designates the piston, 2 thecylinder, 3 the piston anchoring means and 4 the discharge line of thepump. The piston 1 which is supported in an immovable upright positionin the well 5 by the anchoring means 3, is of hollow or tubularformation, and is provided at 'its lower end with external screw threads6 and at its upper end with internal screw threads 7. The cylinder 2slidably embraces the piston 1, and a fluid-tight connection betweenthese parts is established by a cup leather 8 which is secured to theupper end of the piston andcontacts with the inner wall of the cylinder.The upper end portion of the piston 1 is counter-bored, and the lateralwall of this counter-bore 9 is provided with the screw threads 7 Ahollow coupling 10 has its lower end portionpositioned in thecounter-bore 9 and engaged with the screw threads 7. The coupling 10 isprovided with an outer annular shoulder 11 between which and the upperend of the piston 1 is located the horizontal memberv of the cup leather8, so as to permit the coupling to secure the cup leather to the piston.

and slijdably passesthrough a spider 14 arranged lvvi-thir'i thecylinder' 2 near" the upper end of the latter. A nut engaged with theupper end of the guide rod l2handwthe spider 14, providesy means'adaptedto*V lim'iit v l A.cooperate with the lugs Y in limiting the4dwnwardmovement of the segments 29 with 'respect-Y tothe conical tubeportions 17c while t-he movement of thevcylinder 2 in a directionpermitting separation thereof from the piston 1. s ff, s

The coupling 10 is fully open at its lower end and communicates at suchend with the piston 1, and it is provided above tire-cup leather 8"vwith yopei-iii'i-gs 16 through .which the iuidl passesffronr thepistoninto the cylinder 2.

An anchoring` tube 17 which is-locate'dbelow and axial alinementwith thepiston'- 1,

is'secured tothe lower end of the pistonby a' hollow coupling tube 18which is'engaged- '1, with'v the screw threads6= of thepiston "andthre'adedly engaged, as at '19, with the tube.

' mediate portion 17*c A tubular valve seat 2O is secured, as 21,

withinthe coupling 181. A ball valve 22 coperates with the upper endoftheseat' 20" to prevent downfl-ow through the-piston 1;v coupling 18-and 17 ,and it is maintained ini proper relation toi the vaive seat by acagey y23"which is se'cur`ed,`as at 24,- to the valve seat;V .The lowerend of th-e tabel-7 is fullyV open to provide an intake port -25 Jforthe pti-nip.- vThe intake valve 22 is located be= tweenthis portand'thevpistdn V1. s c

The cylinder 2 is secured to the lowerv end ott the' discharge line 4 acoupling 26,L and arranged in the coupling is a check valve 27 adaptedto' prevent `do'wntiow. through the discharge line and the' cylinder.-The cylinder 2l is providednear its lower end with radial openings 28which, when the cylinder is in itsuppermost position with respect to thepiston 1, are .located above the cup leather 8 so as to permit fluid tolflow out-l wardly therethrough over the upper end of the piston and cupleather so as t prevent sediment and sand from..accumula-ting on theseparts. In all otherv positions ot the cylinder 2 with respect to thepistony 1, the openings 2.8 are located Abelow the cup leather' 8 andupper' end of the piston.

J The' external diameter. of the lower' portion 17 a of th'e tube 17 issmaller than that of the upper .portion 171 .of the tube',` andtheinteroi the ltube hasn` ldown- L 'wardly tapered outer surface,- and theanchor'- ing means' 3' is associated with-this-conical pdrtion' of the'tube.- Thismeans comprises a series .of cylindrical'segments 29 whichare arl ranged in surrounding relation tothe conical tube" portion 17 Cand which are-fsecuredto such portions for laxial and radial movementslower end,

ments, 29 in order to cause the segments to move outwardly duringthedownward movement and inwardly during. the upward movement of the Vtubewith respect to the segments. @The upper ends of the grooves 31 areclosed,

at V32', such closed ends of the grooves the prop isbeing lowered intoor withdrawn from the well.-V` The segments 29 vcontar-:t with themtroin'movi-ngupwardly or .downwardly.y i

The pump is lowered! into the' well with the anchoring segments 29in'their lowerlnost pos siti-'en on` the tube 17.y The anchoring: seg:

ments29 are' supported in .this position by the l-ugs 30; and when inthis position they are contracted and willnot interi-'ere with thelowering of thepu-inp into the welll-1. Immediately before the pump hasbeen lowered to the desired entent inte the well, thev anchoringsegments 29' arek held against movement bfyia cable 34 which is securedtothe ,anchoring elements 29 bycords 35.- rllhe further downwardmovementof-the pump into the well willaca-usetlie conical tube poi-tion17 cto pass udcwvnwardly through-the anchoring seg` ments 29 with theresult that the elements will be* moved into engagement with thelining'3`3 of the well. 29 grip the wel-l lining 33,7 the piston-1,coupling 18,2 and tube 17 are' held against upward or downward movementand the discharge line 4inay be reciprocated without displacing theseparts. After the piston-1, coup pling l18 and tube 17 lhave beenanchored in the well, the cable 34 is given a sharp pulito break thecords 35, and thereafter the cable is withdrawn from the well. i j;

Thel upper end portion-v ot the discharge line is slidably mounted inari ordinary pump standard -36, and it is reciprocated throughthemed-iam of alevei- -37 pir'otally supported, as at 38, from the pumpstandard.L A water tight connection is established betweenfthe dischargeline4 and the pump standard by a backing gland 39.V The d fischargeline4i is provided in'its upperendwith a discharge port 40 whichcommunicates with the .pfuinp standard 36 at a pointy abve thepacling 1When thel anchoring segments c from the piston 1 is shown in Figure 8.rIhis form of this means consists of rods 42 extending downwardly fromthe lower end of the cylinder 2 and slidably passing through verticalopenings 43 in the coupling 18, the rods being provided at their lowerends with nuts 44 which contact with the lower end of the coupling tolimit the upward movement of the cylinder with respect to the piston.When this form of the means for preventing the displacement of thecylinder 2 from the piston 1 is employed, the cup leather 8 is securedto the upper end of the piston by a hollow nut 45 which is screwthreadedly engaged in the upper end of the piston and contacts with thehorizontal and vertical members of the coupling element, the nut beinghollow to permit the passage of the iiuid from the piston to thecylinder.

From the foregoing description, taken in connection with theaccompanying drawings, it will be understood that the piston 1 isanchored in the well and that the cylinder 2 and the discharge line 4are reciprocated with respect to the piston through the medium of thelever 37. During the upstrolres of the cylinder 2 and the discharge line4, the iiuid is drawn into the cylinder 2, the water passing into thecylinder through the tube 17, coupling 18 and piston 1 and being heldagainst downiow through these parts by the valve 22. During thedown-strokes of the cylinder 2 and the discharge line 4, the water israised in the cylinder and discharge line and flows from the latter intothe pump standard 36, the water being held against downflow throughthese parts by the valve 27.

Vhile I have described the principle of the invention, together with thestructure which I now consider the preferred embodiment thereof, it isto be understood that the structure shown is merely illustrative andthat such changes may be made, when desired, as fall within the scope ofthe invention as f claimed.

` anchoring the tube in the well, a check valve located in the tube, acylinder slidably engaging the piston, the passages throughout thepiston and tube constituting the sole 1nlet for the cylinder and thecheck valve preventing downward low through the cylinder and piston, awasher on the upper end of the piston contacting with the cylinder, thecylinder being provided near its lower end with radial ports adapted tooccupy a position above the upper end of the piston when the cylinder isin uppermost position with respect to the piston so as to permit waterto fiow `outwardly therethrough over the upper end of the piston andwasher, and means for limiting the upward movement of the cylinder withrespect to the piston.

2. In a well pump, a tubular piston open at its upper and lower ends, atube extending downwardly from the piston, means for anchoring the tubein the well, a check valve located in the tube, a cylinder slidablyengaging the piston, the passages throughout the piston and tubeconstituting the sole inlet for the cylinder and the check valvepreventing downward flow through the cylinder and piston, a washer onthe upper end of the piston contacting with the cylinder, the cylinderbeing provided near its lower end with radial ports adapted to occupy aposition above the upper end of the piston when the cylinder is inuppermost position with respect to the piston so as to permit water toiiow outwardly therethrough over the upper end of the piston and washer,a hollow coupling secured to the upper end of the piston and securingthe washer in place and holding it in contact with the cylinder, aspider carried by the cylinder in the upper end of the latter, and a rodsecured to the coupling and passing through the spider and provided atits upper end with a head cooperating with the spider to limit theupward movement of the cylinder with respect to the piston.

3. In a well pump, a tubular piston open at its upper and lower ends, atube extending downwardly from the piston, means for anchoring the tubein the well, a check valve located in the tube, a cylinder slidablyengaging the piston, the passages throughout the piston and tubeconstituting the sole inlet for the cylinder and the check valvepreventing downward flow through the cylinder and piston, a washer onthe upper end of the piston contacting with the cylinder, the cylinderbeing provided near its lower end with radial ports adapted to occupy aposition above the upper end of the piston when the cylinder is inuppermost position with respect to the piston so as to permit water toHow outwardly therethrough over the upper end of the piston and washer,the tube being provided in the wall thereof with vertical openings, androds secured to the lower end of the cylinder and passing through andprovided at their lower ends with heads cooperating with the lower endof the tube to limit the upward movement of the cylinder with respect tothe piston.

In testimony whereof I hereunto aix my si gnature.

ARTHUR C. NELSON.

said openings

